design, opening day of school and these are sort of young architects, designers, very much into green space and in 2009 i had been to china, spoke at the foreign language institute in beijing and i had a conversation which i never forgot, a young girl stood up and we were talking about green and china and she said mr. friedman, you and america have to grow dirty for 100 years, now it's our turn. it's only fair. so i asked this class to be the 22-year-old future architects, i said is that how you feel? and it was so striking how different they felt now. so three, four years later... >> rose: mainly because of the impact of pollution and other things? >> exactly. that now it was well, you know, maybe that would be fair, we should get a chance to have our slice of the pie. but you know what? we can't afford it. we can't breathe, we can't drink we can't drive. we've got to grow in a different way. and so one of the conversations i had there, charlie, was really striking for me.